Spatial Distribution Pattern of Tetranychus urticae Koch (Acari: Tetranychidae) on Different Rosa Cultivars in Greenhouse Tehran
محورهای موضوعی : مجله گیاهان زینتیFatemeh Bidarnamani 1 , Elham Sanatgar 2 , Mehdi Shabanipoor 3
1 - Institute of Agricultural Science, University of Zabol, Zabol, Iran
2 - Department of Entomology, Faculty of Agriculture, Islamic Azad University, Arak .Iran.
3 - Ph.D. Student in Agricultural Entomology Arak, Arak Iran
کلید واژه: Density, spatial distribution, Tetranychus urticae, Rosa,
چکیده مقاله :
The two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae),is an economically important pest of ornamental plant in Iran. Thepopulation abundance and spatial distribution were studied on five Rosa cultivarsincluding Maroussia, Wendela, Elderado, Wenedetta, and Hot Lady during twogrowing seasons of 2011 and 2012 in greenhouse. The k parameter, index of dispersion,Lloyd’s mean crowding, Morisita’s index and regression methods(Taylor and Iwao) were used to estimate the spatial distribution pattern ofmite. There was improved sampling program by k parameter and coefficientsof regression models. The result indicated that the highest population densityof T. urticae was early of July (2.47 per leaf) and early of September (4.11 perleaf). Also, a sequential sampling plan was developed using the fixed-precisionmethod of Green for estimating the density of the mite. Populations on differentRosa cultivars, especially Maroussia, were aggregated during most of thegrowing season and negative binomial models fit data sets better than thePoisson series. The mean number of two-spotted spider mite per plant had significantlydifference between all plant strata. The fitness percentage of cultivarMaroussia Rosa revealed a slight tendency towards the Poisson distribution, sothat 58 and 14.1 percent of data sets from T. urticae on cultivar Wenedettapopulations fit the Poisson distribution. These results fully support findings ofdistribution indices, indicating an aggregated distribution. Determining samplingprogram and spatial distribution pattern of the pest can effectively help to designand perform of IPM.
یکی Tetranychus urticae Koch (Acari: Tetranychidae( کنه دو نقطه ایاز آفات مهم اقتصادی گیاهان زینتی در ایران می باشد. فراوانی جمعیت و توزیعHot و Maroussia، Wendela، Elderado، Wenedetta فضایی پنج رقم رز شاملدر طول دو فصل رشد در سال های 1390 و 1391 در گلخانه رز پاکدشت تهران Ladyشاخص پراکندگی، میانگین تراکم لیود، شاخص موریسیتا و ،k مطالعه شد. پارامتربرای تخمین الگوی توزیع فضایی بکار برده شد. )Iwao و Taylor( روش های رگرسیونو ضرایب مدل های رگرسیون وجود k برنامه های اصلاحی نمونه برداری توسط پارامتر2 در / اوایل تیر ) 47 T. urticae داشت. نتایج نشان داد که بیشترین تراکم جمعیتی4 در هر برگ( بودند. هم چنین یک برنامه نمونه برداری / هر برگ( و اوایل شهریور ) 11دنباله ای بصورت گسترده با استفاده از مدل گرین برای تخمین تراکم کنه استفادهدر اکثر فصل رشد بصورت ،Maroussia شد. جمعیت روی ارقام مختلف رز به ویژهتجمعی بود و مدل های دو جمله ای منفی مجموعه داده ها را بهتر از مدل پویسونتطبیق دادند. میانگین تعداد کنه دو نقطه ای در هر گیاه بین قسمت های مختلف آننشان داد گرایش کمی Maroussia اختلاف معنی داری داشت. درصد تطبیق رقم رز14 درصد از مجموعه داده های / به سمت مدل پویسون هم دارد. هم چنین 58 و 1تطبیق بیشتری با توزیع پویسون داشت. این Wenedetta بر روی رقم T. urticaeنتایج بطور کامل یافته های شاخص پراکنش را تأیید می کند و نشان دهنده توزیعتجمعی است. تعیین برنامه نمونه برداری و الگوی توزیع فضایی آفت بر روی طراحیو اجرای مدیریت تلفیقی آفت می تواند اثرگذار باشد.
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